Cheek retractor



FIG. 1 is a side elevational view of a cheek retractor showing our new design;

FIG. 2 is a top plan view of a cheek retractor thereof;

FIG. 3 is a perspective view of a cheek retractor thereof; and,

FIG. 4 is another perspective view of a cheek retractor of FIG. 1 inverted relative to its position in FIG. 3. 

The ornamental design for a cheek retractor, as shown and described. 